Disk brake cylinder assembly with parking mechanism and brake caliper

Abstract

The invention discloses a disk brake cylinder assembly with a parking mechanism and a brake caliper. The disk brake cylinder assembly comprises a cylinder block, a piston, a travel adjusting threaded sleeve, a travel adjusting threaded rod, a steel ball, a drive shaft, a plane sliding bearing, an O-shaped seal ring and a spring resetting device. One end of the travel adjusting threaded rod is provided with a multi-head saw-tooth thread. The other end of the travel adjusting threaded rod is a ball disk with slope rolling ways. Arc-shaped guide bosses are evenly distributed on the outer edge of the ball disk, and the bosses are matched with grooves in a cylinder hole and prevent the travel adjusting threaded rod from rotating. The travel adjusting threaded rod has good centering performance, and therefore an auxiliary piston having the centering function in the piston is omitted. By the adoption of the disk brake cylinder assembly with the parking mechanism, the movement type of parts of the parking mechanism is simplified, and the risk that multiple leaking points exist in existing known structures is avoided. The disk brake cylinder assembly with the parking mechanism is simple in structure and higher in safety performance, the parts can be more easily machined, the transmission efficiency of the parking brake force is improved, and low cost, high performance and higher safety performance are effectively combined.

Description

technical field [0001] The invention belongs to the field of a disc brake mechanism with a parking mechanism, and specifically refers to a disc brake cylinder assembly with a parking brake mechanism. The invention also relates to a rear- Parking disc brake calipers. Background technique [0002] In the currently known disc brake calipers with parking brake mechanisms, the stroke adjustment screw and the adjustment screw sleeve are generally used to transmit the axial control force, and the friction material of the brake pad is compensated by the thread extension. wear and tear. During the transmission of the axial braking force, the force acts on the helical surface of the matching screw and the screw sleeve, which will cause the screw or the screw sleeve to rotate and relax the force. In order to ensure that there is no slack in the process of force transmission, an anti-rotation mechanism must be added to prevent the screw or screw sleeve from rotating, and only allow ax...

AI Technical Summary

Problems solved by technology

[0007] 1. Using the anti-rotation stop screw, the transmission of parking force will be affected by the bias force of the stop screw, which will aggravate the wear of the parts and reduce the efficiency of the mechanism; and the stop screw may also loosen and cause damage under the action of force. Leakage or parking failure;

[0008] 2. The eccentric anti-rotation pin is adopted, and the machining accuracy and assembly requirements of its parts are high; the set eccentric anti-rotation pin is under the action of bias force, resulting in poor centering of the force transmission parts and low force transmission efficiency

[0009] 3. Although the use of the fixed sleeve solves the influence caused by the bias force, it increases the number of parts and the difficulty of manufacturing fit. The fit accuracy of each part directly affects the centering performance of the parts and reduces the efficiency of the manipulator;

[0010] 4. In the above-mentioned known parking brake mechanism, the brake mechanism is affected by the reaction force of the stop screw and the eccentric anti-rotation pin or the gap formed by the multiple mating surfaces of the fixed sleeve and the manufacturing error, which will cause the force transmission parts to Poor centering, the force transmitted to the piston will deviate from the axis of the piston, and the parts will be unbalanced in force; therefore, in the above-mentioned known parking mechanism, an auxiliary piston is added in order to overcome the defects of the prior art, and its purpose is to Increase the centering of the screw sleeve or screw; but the addition of auxiliary pistons requires additional sealing rings and additional vent holes on the pistons, which increases the risk of oil leakage

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